Weil-McLain ULTRA299-S4 Manual page 81

S 4
®
ERIES GAS
DIRECT VENT: Vertical vent / sidewall air
Multiple air terminations
1. When terminating multiple Ultra boiler air connections, terminate
each air connection as described in this manual.
2. Place wall penetrations to obtain minimum clearances as instructed
in this manual.
3. Place adjacent air inlets for multiple Ultra boilers at least 6 inches
apart.
4. For Canadian installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code.
5. Combustion air (NOT vent piping) can be manifolded as shown
in the Ultra boiler manual.
Prepare wall penetrations
1. Air pipe penetration:
a. Cut a hole for the air pipe. Size the air pipe hole as close as
desired to the air pipe outside diameter.
2. Seal exterior openings thoroughly with exterior caulk.
Termination and fi ttings
1. Prepare the air termination elbow ( Figure 93 ) by inserting a bird
screen. Bird screens must be purchased separately. See the parts
list at the end of this manual for part numbers.
2. Use metal plates (by installer) at inside and ouside penetrations
as shown in Figure 94 .
If extending the air pipe out from the wall, install a cou-
pling on each pipe. Mount the piping with the coupling
fl ush with the outer plate.
Connecting from air termination to boiler
1. Install the terminations as instructed in the following. Then pro-
ceed to page 82 to complete the air and vent piping between the
termination and the boiler.
Part number 550-100-400/0717
-
FIRED WATER BOILER
— Boiler Manual
Sidewall air inlet installation for direct vent:
vertical vent / sidewall air
1 Air piping
2 Sidewall plates, by installer
(continued)
3 Bird screen (air), by installer
4 Air inlet elbow
81